v0.385.4 fixes some minor bugs and updates some enemy sprites.

Changelog

• Updated Stage 1 and Stage 5-B Medium and Heavy enemy sprites (H6K, An-26 and B-2 Spirit, respectively)
• Forgot to change the in-game version number in v0.385.3. It was v0.385.2
• Made the following bosses more challenging in all difficulty levels:
  • Bronze Harpy (Stage 6-A endboss)
  • Xenoscorpius (Stage F-B midboss)
• BUGFIX: Fixed Raiden II medium explosion generated from Jasper Gigas' bombs appearing under the houses in 3-A
• BUGFIX: Fixed Stage 6-A endboss Bronze Harpy not attacking at all in its barrel roll bullet attack pattern in its second phase in Novice difficulty